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Pterosaurs were the first reptiles to develop powered flight. They lived for a long time, from the Late Triassic to the End of the Cretaceous (228...

The gray wolf, also known as the timber wolf or western wolf, is the largest species of wolf on the planet. Known for traveling in packs, each grou...

This seal’s common name doesn’t only refer to its spots – it’s also one of the top predators in the Antarctic, just like the big cat its named for....

  A common creature of the Arctic tundra, the Arctic fox is a member of the Vulpes genus. It is well-adapted to living in cold, harsh environments ...

The coelacanth is the common name of a large marine fish that is found today near the Comoro Islands off the east coast of Africa. It belongs to an...

  Smaller, but strikingly similar to the gray wolf, coyotes are a canine that densely inhabit North and Central America. What coyotes lack in size ...

Sei (pronounced “sigh”) whales are some of the largest animals on the planet, and one of the fastest whales in the sea. Using its unique baleen to ...

Doedicurus is an extinct armored plant-eating armadillo. Its heavy bony armor and spiked tail club helped protect it from sabre-toothed predators a...

The jaguar is the largest cat in the New World, and this fearsome hunter can take down just about any prey it wants. It’s the only cat in the Ameri...

Pteranodon was a huge flying reptile with a wingspan of over 20 feet. It belonged to an extinct group of reptiles called pterosaurs. Pterosaurs wer...

 Mantas are the largest members of the superorder Batoidea, commonly known as rays. Despite their large size (up to 20 feet across), manta rays pos...

Brachiosaurus was a large herbivorous sauropod dinosaur that lived during the Late Jurassic Period (155-150 million years ago) in what is now weste...

Bison are the largest land mammal in North America. There are two subspecies of American bison, the plains and woods bison, though the plains bison...

The whitetip reef shark is a requiem shark, meaning it is a member of the Carcharhinidae family, like the bull shark, grey reef shark, tiger shark ...

The multi-headed Hydra, serpent of the swamp at Lerna, comes from a strange family. Its siblings include Cerberus the three-headed dog and the Chim...

Lion, goat, and serpent, the Chimera continues the mythological tradition of frightening hybrids. She comes from a famous family as well, counting ...

Despite their somewhat wolf-life appearance, the closest relative to hyenas are cats, mongooses, and civets, all of which make up the Feliformia su...

Though similar in appearance to the woolly mammoth, the American mastodon is not closely related. The mastodons split from the other members of the...

As snow blows over the frozen tundra, the Siberian husky proudly crests the horizon, sled in tow. Famous for its beautiful, thick coat and its abil...

The fearsome looking Hyaenodons were the top predators of their day, reigning for over 25 million years from the Eocene to the Miocene epochs. Thou...

  The most arboreal of all the great apes, orangutans spend most of their time in trees. Females are wholly responsible for raising their young; th...

Unlike many other mammals, newborn zebras are fairly self-sufficient when they’re born, and can stand and walk on their own. Did you know it was ...

Schnauzers, an ancient German breed, have so many distinguishing characteristics, from their short tails to their unique ears, to the mustachioed f...

One of the most well-known dinosaurs of all time, Triceratops is easily recognized by its two large brow horns, its short nose horn and its large ...